The development of laser technologies in medicine and industrial production created a problem connected with using impulse laser radiation due to the high risks of eye damage. Andrey Zvyagin, assistant at the Department of Optics and Spectroscopy, created an efficient mechanism that can help protect eyesight. The project of the young researcher “Development of low-threshold limiters of visible optical density based on hybrid associates of colloid quantum dots and dye molecules” will allow the production of inexpensive optical coatings which will efficiently limit impulse laser radiation that is harmful for eyesight.
“This development is a step forward to a new level of using laser technologies which are common for processing industry, machine building, and medicine. We are planning to develop “smart” materials for enterprises and manufacturing plants that will manage the intensity of laser radiation based on the hybrid associates of colloid quantum dots and dye molecules. The aim of the project is to create a system to manage optical radiation parameters, i.e. a fast-responding protection for optical radiation receivers. This technology will help preserve many people’s eyesight,” said Andrey Zvyagin.
This is an innovative approach as it develops original materials with unique hybrid properties by combining inorganic and organic structures. It proposes to create thin films with hybrid associates of colloid quantum dots and organic dye molecules to lower the risk of damaging optical radiation receivers. These chemical materials have already proved to be efficient limiters of optical density. Innovative coating can be applied to optical surfaces which will be mounted in optical circuits without changing working parameters. It can also be used for eyeglass lenses without affecting colour sensation. When the optical radiation density reaches a given level the nanomaterial can absorb or scatter the beam depending on the optical response, and thus limit the radiation density.
“Today, glasses with special colour filters, active polarisation filters, and electro-optical shutters are used to protect organs of sight and radiation receivers. However, all of them have disadvantages: glasses with linear colour filters cannot protect eyes at an intensity of 107 Wt/sm2, glasses with active colour filters do not respond immediately and require additional power sources, electro-optical shutters need high voltage and a feedback system. Our development of passive limiters of optical density does not require additional power sources and feedback systems, as the limiting effect is based on the interaction of the radiation with the active ingredient,” said the researcher.
The finished product is expected to be introduced to processing industry enterprises (metal etching and marking, surface quenching, and processing of ulrahard materials), medical institutions for diagnostics and surgery (ophthalmological, oncological, radiodontia), science towns, and innovative centres.